44 



OPHIOGLOSSACEAE 



[CH. 



phyllous as a rule, though occasionally two or more leaves may be expanded 

 in one season, especially in the larger species. Each leaf bears at its base 

 a protective stipular growth. Both the sterile blade and the fertile spike are 



Fig. 336. Botrychuim simplex Hiichc. Series of forms, a-f, fo7-i?ia si/iiplissitna 'L?isc\i.; 

 g-k, forma incisa Milde ; /, transitional io forma siibcomposiia Lasch.; m, has an en- 

 larged fertile basal segment of the sterile blade; 0, r, for ma composita Lasch., rwith 

 four primary segments of the sterile part. From Luerssen, in Rah. Krypt. Flora: the 

 drawings were from specimens in his herbarium. (Natural size.) Probably they 

 illustrate progressive states of ontogenetic development. 



